Although betas tend to do alright in smaller spaces (you’d still need some system of cleaning, filtering and oxidization though) goldfish are unbelievably filthy fish. Without a proper filtering system you’d have to clean the tank/bowl/whatever out everyday, and even then the dang thing would die in a few weeks anyway. (Heck, carnval feeder-fish die if you look at them funny).

This bowl is one of those things that looks neat in a picture, but lacks the glamor when youre flushing out the fourth goldfish that week and the bowl is fogged up and full of old fish poop.

(Also, fish dont shrink, they just stay small depending on their tank size and amount of food.)

I thought the comment abou the pidly plant was amusing – especially when one of the written selling points id that the fish’s plants no lnger have to be boring.

I think the design is interesing and can be improved on – though i’m one that would argue against the idea of ‘form beyond function” – it’s something that’s dwelling into the region of useless to merely appear pretty.
to all designer out there: form follows function – do what needs to be done in an enovative and artistic manner, rather than just adding a flourish